The barrier to entry is low. The community, though small, is passionate. And there is a unique joy in seeing a character like The Great Muta appear on your Wii menu, fighting Hulk Hogan in a custom Tokyo Dome arena, all running on hardware that launched in 2006.
Here’s a helpful post covering the essentials for modding : wwe 12 mod wii
Would you like a step-by-step for one specific type of mod, like replacing an entrance theme or editing a wrestler’s attire texture on the Wii? The barrier to entry is low
WWE ’12 Wii Mod Guide: Install Custom Arenas, Superstars & Texture Packs (No Brick Risk) wwe 12 mod wii
Most modding projects for WWE '12 on Wii focus on converting the game into a "new" release: